CN113137409A - Electromagnetic reversing valve test method in ultrahigh pressure environment - Google Patents
Electromagnetic reversing valve test method in ultrahigh pressure environment Download PDFInfo
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- CN113137409A CN113137409A CN202110356543.7A CN202110356543A CN113137409A CN 113137409 A CN113137409 A CN 113137409A CN 202110356543 A CN202110356543 A CN 202110356543A CN 113137409 A CN113137409 A CN 113137409A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/027—Check valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
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Abstract
The invention discloses a method for testing an electromagnetic directional valve in an ultrahigh pressure environment, which is characterized in that an experimental electromagnetic directional valve is arranged on an experimental station of ultrahigh pressure electromagnetic directional valve testing equipment, and then a compressive strength test, a high pressure sealing test, a response characteristic test, an internal leakage test, a forward pressure loss test, a reverse pressure loss test, a back pressure test and a durability service life test of the experimental electromagnetic directional valve are carried out; compared with the existing ultrahigh pressure pump system, the special high-pressure electromagnetic directional valve test equipment has the advantages of long service life, high reliability, better safety, small heat productivity and cost lower than 2 times. The method can be used for experimental verification in the design process of an ultrahigh pressure hydraulic valve development manufacturer, provides experimental data support for research and development designers, and improves the safe service life and reliability. The method can be used for performance verification when leaving the factory, improves the qualification rate of leaving the factory and improves the quality of the product.
Description
Technical Field
The invention belongs to the technical field of electromagnetic reversing valve test equipment, and particularly relates to a method for testing an electromagnetic reversing valve in an ultrahigh pressure environment.
Background
In recent years, with the rapid development of engineering machinery, the demand for ultrahigh pressure hydraulic elements is increasing day by day, and higher requirements are put forward on the performance reliability of ultrahigh pressure hydraulic valves, so that ultrahigh pressure test equipment needs to be developed to test the performance of the ultrahigh pressure test equipment, improve or check the service performance of the ultrahigh pressure test equipment, find problems in advance and solve the problems. In view of the ultrahigh pressure test equipment at home and abroad, the ultrahigh pressure hydraulic technology at home and abroad is mature, and various ultrahigh pressure elements are widely applied to industrial equipment, such as international well-known brands of American HAWE, German BUCHER, Switzerland BIERI and the like. However, China develops slowly in this aspect, the foundation is weak, the ultrahigh pressure hydraulic technology is not obviously improved, certain technology accumulation is not formed, the reliability is poor, the ultrahigh pressure hydraulic technology cannot be widely applied to industrial equipment, and the ultrahigh pressure hydraulic technology mainly depends on import. However, in China, research and development manufacturers of test equipment of the ultrahigh pressure valve are few, the existing high-pressure test equipment has the problems of low universality and standardization level, short service life, poor reliability and the like, the test pressure is about 35MPa, and the ultrahigh pressure test equipment belongs to the ultrahigh pressure category when the pressure is more than 32 MPa. The ultrahigh pressure hydraulic component cannot be effectively detected and evaluated.
Although some manufacturers in China autonomously develop ultrahigh pressure pumps for ultrahigh pressure tests, the ultrahigh pressure pumps have the following problems: short service life, low safety, high cost and large flow pressure fluctuation. Therefore, aiming at the current situation and the quality control of the ultrahigh pressure element, the ultrahigh pressure electromagnetic directional valve test equipment is developed and developed, the directional valve which is used most frequently can be effectively detected by utilizing the equipment, the product quality is improved, the influence on the performance of the whole machine after the ultrahigh pressure valve is operated on the machine is avoided, meanwhile, test data support is provided for the research and development design of the ultrahigh pressure valve, and the valve is convenient to optimize and improve.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the test method of the electromagnetic reversing valve in the ultrahigh pressure environment, which has the advantages of long service life, high reliability, better safety and small heat productivity, can be used for performance verification when leaving a factory, improves the qualification rate when leaving the factory and improves the product quality.
The invention is realized in such a way that the electromagnetic directional valve test method under the ultrahigh pressure environment comprises the following steps: installing the tested electromagnetic directional valve on an experimental station of ultrahigh pressure electromagnetic directional valve test equipment, and then performing a compression strength test, a high pressure sealing test, a response characteristic test, an internal leakage test, a forward pressure loss test, a reverse pressure loss test, a back pressure test and a durability service life test on the tested electromagnetic directional valve; the ultrahigh pressure electromagnetic directional valve test equipment comprises: the system comprises a hydraulic oil tank and a crude oil supply main pipe connected with the hydraulic oil tank, wherein the crude oil supply main pipe is connected with a low-pressure oil supply port P1 of a supercharger; a high-pressure output port Ph of the supercharger is connected with the experimental branch unit, and an oil return port T of the supercharger is connected with the hydraulic oil tank through a safe oil return pipe; the oil return main pipe is connected with the experiment branch unit and is connected with a hydraulic oil tank; wherein: the crude oil supply main pipe is sequentially provided with an oil absorption filter, a gear pump, a one-way valve, a pipeline filter and a pressure gauge, wherein the gear pump is connected with a gear pump driving motor, and a throttle valve communicated with a safe oil return pipe is arranged between the pipeline filter and the one-way valve; a low-pressure overflow valve and a two-position four-way electromagnetic valve are also arranged between the crude oil supply main pipe and the safe oil return pipe; the experiment branch unit is at least connected with an experiment branch and a backpressure branch in parallel; respectively installing a high-pressure needle valve on each experiment branch and one backpressure branch, wherein the outlet of the high-pressure needle valve is connected with the inlet of the electromagnetic directional valve to be tested; and an outlet of the tested electromagnetic directional valve is connected with an oil return collecting pipe, and the oil return collecting pipe is provided with a loading pressure regulating valve, a loading throttle valve and a flowmeter.
The experimental method based on the ultrahigh pressure electromagnetic directional valve test equipment comprises the following steps: the method comprises the following specific steps:
s1, carrying out compressive strength test; starting a gear pump driving motor in a crude oil supply main pipe, opening a two-position four-way electromagnetic valve, closing an experimental electromagnetic directional valve, adjusting an overflow valve to enable the pressure of an experimental branch unit pressure sensor to gradually increase from zero to nominal pressure, observing the state of the experimental electromagnetic directional valve in an adjusting process, and checking whether all parts deform after the adjustment. If the deformation is within the allowable range, the tested valve is qualified; if the deformation is out of the allowable range, the tested valve is unqualified;
s2, high-pressure sealing test; firstly, carrying out a P port high-pressure sealing test of a positive cavity of an experimental electromagnetic directional valve, starting a gear pump driving motor in a crude oil supply main pipe, opening a two-position four-way electromagnetic valve, closing the experimental electromagnetic directional valve, adjusting an overflow valve to gradually increase the pressure of a pressure sensor of an experimental branch unit from zero to nominal pressure, and observing the state of the experimental electromagnetic directional valve in the test process; and secondly, performing a high-pressure sealing test on the R port of the reverse cavity of the tested electromagnetic directional valve, closing a high-pressure needle valve on the experiment branch and a high-pressure needle valve on the return oil collecting pipe, opening a high-pressure needle valve of the back pressure branch, enabling pressure oil to flow to the R port of the reverse cavity of the tested electromagnetic directional valve through the return oil collecting pipe, observing the state of the tested electromagnetic directional valve in the test process, and checking whether all parts deform after the test is finished. If the deformation is within the allowable range, the tested valve is qualified; if the deformation is out of the allowable range, the tested valve is unqualified;
s3, response characteristic test; starting a gear pump driving motor in a crude oil supply main pipe, opening a two-position four-way electromagnetic valve, adjusting an overflow valve to enable the pressure of an experiment branch unit pressure sensor to be the nominal pressure of an experiment electromagnetic directional valve, enabling the passing flow to be the experiment flow, opening a high-pressure needle valve, and adjusting a loading overflow valve to enable the back pressure of the experiment electromagnetic directional valve to be zero. The experimental electromagnetic reversing valve is opened and closed, the opening and closing processes of the experimental electromagnetic reversing valve are recorded by the pressure sensor, and the opening time, the closing time, the opening lag time and the closing lag time of the experimental electromagnetic reversing valve are measured.
S4, performing internal leakage test; starting a gear pump driving motor in a crude oil supply main pipe, opening a two-position four-way electromagnetic valve, closing an experimental electromagnetic directional valve, adjusting an overflow valve to enable the pressure of an experimental branch unit pressure sensor to change from zero to a nominal pressure range, opening a high-pressure needle valve, and measuring the leakage rate at the outlet of the experimental electromagnetic directional valve by using a flowmeter.
S5, positive pressure loss; starting a gear pump driving motor in a crude oil supply main pipe, opening a two-position four-way electromagnetic valve, adjusting an overflow valve to enable the pressure of a pressure sensor of an experimental branch unit to be a certain value, enabling an experimental electromagnetic directional valve to be completely opened, and enabling the flow to change from zero to the experimental flow range; measuring the pressure loss of the tested electromagnetic directional valve by using the pressure sensor of the test branch unit; and drawing a qv-delta p characteristic curve, and judging whether the pressure loss is within a designed allowable range through the curve.
S6, reverse pressure loss; starting a gear pump driving motor in a crude oil supply main pipe, opening a two-position four-way electromagnetic valve, adjusting an overflow valve to enable the pressure of a pressure sensor of an experimental branch unit to be a certain value, enabling an experimental electromagnetic directional valve to be completely opened, and enabling the flow to change from zero to the experimental flow range; and measuring the reverse pressure loss of the tested electromagnetic directional valve by using the pressure sensor of the test branch unit, drawing a qv-delta p characteristic curve, and judging whether the pressure loss is in a designed allowable range or not according to the curve.
S7, back pressure test; starting a gear pump driving motor in a crude oil supply main pipe, opening a two-position four-way electromagnetic valve, closing an experimental electromagnetic directional valve, adjusting an overflow valve to enable the pressure of a pressure sensor of an experimental branch unit to gradually increase from zero to nominal pressure, closing a high-pressure needle valve on the experimental branch unit, opening a high-pressure needle valve of a backpressure branch, enabling pressure oil to flow to a reverse cavity R port through an oil return collecting pipe, observing the state of the experimental electromagnetic directional valve, and checking whether all parts deform after the test. If the deformation is within the allowable range, the tested valve is qualified; if the deformation is outside the allowable range, the tested valve is unqualified.
S8, durability life test; starting a gear pump driving motor in a crude oil supply main pipe, opening a two-position four-way electromagnetic valve, adjusting an overflow valve to enable the pressure of a pressure sensor of an experiment branch unit to be the nominal pressure of an experiment electromagnetic directional valve, enabling the passing flow to be the experiment flow, repeatedly reversing the experiment electromagnetic directional valve, recording the action times of the experiment electromagnetic directional valve, wherein the action times are not less than 2 ten thousand, and checking whether main parts and main performance meet design requirements.
Above-mentioned technical scheme is preferred, still be equipped with the heater that is used for heating fluid on the hydraulic tank for detect the temperature sensor of the interior fluid temperature of hydraulic tank. In the normal experiment process, the heater does not work, when the temperature sensor detects that the temperature of the oil is lower than the temperature required by the experiment, the heater automatically starts to heat until the temperature meets the experiment temperature requirement, and stops working;
according to the preferable technical scheme, the oil leakage collecting box is arranged below the crude oil supply main pipe and the experiment branch unit and used for collecting oil leakage in the experiment process of the crude oil supply main pipe and oil leakage in the disassembly and assembly process of the experiment branch unit by the experiment electromagnetic directional valve, and the automatic recovery to the hydraulic oil tank is realized.
Preferably, the oil return main pipe is provided with an air-cooled radiator; in the normal experiment process, the radiator does not work, when the temperature sensor detects that the temperature of the oil liquid exceeds the temperature required by the experiment, the air-cooled radiator automatically starts cooling, and stops working until the temperature meets the temperature requirement of the experiment;
above-mentioned technical scheme is preferred, be equipped with empty filter on the hydraulic tank for maintain oil tank internal pressure and atmosphere balance, avoid the pump cavitation phenomenon probably to appear, can be arranged in the filth in the filtration fluid when refueling again, communicate with the atmosphere all the time in the experimentation, do benefit to the hydraulic pump oil absorption.
Preferably, the hydraulic oil tank is provided with a liquid level thermometer; the hydraulic oil tank can display the liquid level and the temperature of oil in the hydraulic oil tank in real time.
The invention has the advantages and technical effects that:
firstly, compared with the existing ultrahigh pressure pump system, the high pressure electromagnetic directional valve test equipment has the advantages of long service life, high reliability, better safety, small heat productivity and cost lower than more than 2 times. The method can be used for experimental verification in the design process of an ultrahigh pressure hydraulic valve development manufacturer, provides experimental data support for research and development designers, and improves the safe service life and reliability. The method can be used for performance verification when leaving the factory, improves the qualification rate of leaving the factory and improves the quality of the product.
The invention has the advantages in the experimental process:
1. the oil path switching valve used in the experiment is a high-pressure needle valve, so that the pressure resistance is high, no leakage exists, and the experiment result is accurate and reliable;
2. an upgrade interface is reserved to meet future requirements, and upgrade cost is reduced. And the multi-station experiment can be flexibly switched, so that the test efficiency is improved.
3. The temperature sensor is used for monitoring the oil temperature in real time, and the constant temperature control is realized by controlling the starting and stopping of the heater and the radiator.
4. The experimental data acquisition is accurate and reliable, and the operation is convenient and rapid.
Drawings
FIG. 1 is a hydraulic schematic diagram of embodiment 1 of the present invention;
fig. 2 is a hydraulic schematic diagram of embodiment 2 of the present invention.
In the figure, 1, an oil drain ball valve; 2. an oil absorption filter; 3. a motor; 4. a low noise gear pump; 5. a one-way valve; 6. a throttle valve; 7. a line filter; 8. a pressure gauge; 9. a low pressure relief valve; 10. a two-position four-way solenoid valve; 11. a supercharger; 12. 13, a high-pressure needle valve; 14. an experimental electromagnetic directional valve; 15. an oil return header pipe; 16. a pressure sensor; 17. a high pressure needle valve; 18. loading a pressure regulating valve; 19. loading a throttle valve; 20. a flow meter; 21. an air-cooled radiator; 22. an air filter; 23. a liquid level meter; 24. a hydraulic oil tank; 25. a heater; 26. an oil leakage collection box; 27. a temperature sensor.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1, please refer to fig. 1, a method for testing an electromagnetic directional valve in an ultra-high pressure environment: installing the tested electromagnetic directional valve on an experimental station of ultrahigh pressure electromagnetic directional valve test equipment, and then performing a compression strength test, a high pressure sealing test, a response characteristic test, an internal leakage test, a forward pressure loss test, a reverse pressure loss test, a back pressure test and a durability service life test on the tested electromagnetic directional valve; the ultrahigh pressure electromagnetic directional valve test equipment comprises: the hydraulic oil tank 24 and a crude oil supply main pipe connected with the hydraulic oil tank, wherein the crude oil supply main pipe is connected with a low-pressure oil supply port P1 of the supercharger; a high-pressure output port Ph of the supercharger is connected with the experimental branch unit, and an oil return port T of the supercharger is connected with the hydraulic oil tank through a safe oil return pipe; the oil return main pipe is connected with the experiment branch unit and is connected with a hydraulic oil tank;
wherein: the crude oil supply main pipe is sequentially provided with an oil absorption filter 2, a gear pump 4, a one-way valve 5, a pipeline filter 7 and a pressure gauge 8, wherein the gear pump is connected with a gear pump driving motor 3, and a throttle valve 6 communicated with a safe oil return pipe is arranged between the pipeline filter and the one-way valve; a low-pressure overflow valve 9 and a two-position four-way electromagnetic valve 10 are also arranged between the crude oil supply main pipe and the safe oil return pipe;
the experiment branch unit is at least connected with an experiment branch and a backpressure branch in parallel; a high-pressure needle valve 13 is respectively arranged on each experiment branch and each backpressure branch, and the outlet of the high-pressure needle valve is connected with the inlet of the electromagnetic directional valve to be tested; the outlet of the tested electromagnetic directional valve is connected with a return oil collecting pipe 15, and the return oil collecting pipe is provided with a loading pressure regulating valve 18, a loading throttle valve 19 and a flowmeter 20.
Above-mentioned technical scheme is preferred, still be equipped with the heater that is used for heating fluid on the hydraulic tank for detect the temperature sensor of the interior fluid temperature of hydraulic tank. In the normal experiment process, the heater does not work, when the temperature sensor detects that the temperature of the oil is lower than the temperature required by the experiment, the heater automatically starts to heat until the temperature meets the experiment temperature requirement, and stops working;
according to the preferable technical scheme, the oil leakage collecting box is arranged below the crude oil supply main pipe and the experiment branch unit and used for collecting oil leakage in the experiment process of the crude oil supply main pipe and oil leakage in the disassembly and assembly process of the experiment branch unit by the experiment electromagnetic directional valve and automatically recycling the oil leakage to the hydraulic oil tank 24.
Preferably, the oil return main pipe is provided with an air-cooled radiator; in the normal experiment process, the radiator does not work, when the temperature sensor detects that the oil temperature exceeds the temperature required by the experiment, the air-cooled radiator automatically starts cooling, and stops working until the temperature meets the experiment temperature requirement.
Above-mentioned technical scheme is preferred, be equipped with empty filter on the hydraulic tank for maintain oil tank internal pressure and atmosphere balance, avoid the pump cavitation phenomenon probably to appear, can be arranged in the filth in the filtration fluid when refueling again, communicate with the atmosphere all the time in the experimentation, do benefit to the hydraulic pump oil absorption.
Preferably, the hydraulic oil tank is provided with a liquid level thermometer; the hydraulic oil tank can display the liquid level and the temperature of oil in the hydraulic oil tank in real time.
The experimental method based on the ultrahigh pressure electromagnetic directional valve test equipment comprises the following steps: the method comprises the following specific steps:
s1, carrying out compressive strength test; starting a gear pump driving motor 3 in a crude oil supply main pipe, opening a two-position four-way electromagnetic valve 10, closing an experimental electromagnetic directional valve, adjusting an overflow valve 9 to enable the pressure of an experimental branch unit pressure sensor 12 to gradually increase from zero to nominal pressure, observing the state of the experimental electromagnetic directional valve in an adjusting process, and checking whether all parts deform after the adjustment. If the deformation is within the allowable range, the tested valve is qualified; if the deformation is out of the allowable range, the tested valve is unqualified;
s2, high-pressure sealing test; firstly, carrying out a P port high-pressure sealing test of a positive cavity of an experimental electromagnetic directional valve, starting a gear pump driving motor 3 in a crude oil supply main pipe, opening a two-position four-way electromagnetic valve 10, closing the experimental electromagnetic directional valve, adjusting an overflow valve 9 to enable the pressure of an experimental branch unit pressure sensor 12 to be gradually increased from zero to nominal pressure, and observing the state of the experimental electromagnetic directional valve in the test process; and secondly, performing a high-pressure sealing test on the R port of the reverse cavity of the tested electromagnetic directional valve, closing the high-pressure needle valve 13 on the test branch and the high-pressure needle valve 17 on the return oil collecting pipe 15, opening the high-pressure needle valve 13 on the back pressure branch, enabling pressure oil to flow to the R port of the reverse cavity of the tested electromagnetic directional valve through the return oil collecting pipe 15, observing the state of the tested electromagnetic directional valve in the test process, and checking whether all parts are deformed or not after the test is completed. If the deformation is within the allowable range, the tested valve is qualified; if the deformation is out of the allowable range, the tested valve is unqualified;
s3, response characteristic test; starting a gear pump driving motor 3 in a crude oil supply main pipe, opening a two-position four-way electromagnetic valve 10, adjusting an overflow valve 9 to enable the pressure of an experiment branch unit pressure sensor 12 to be the nominal pressure of the electromagnetic directional valve to be tested, enabling the passing flow to be the test flow, opening a high-pressure needle valve 17, and adjusting a loading overflow valve 18 to enable the back pressure of the electromagnetic directional valve to be tested to be zero. Opening and closing the tested electromagnetic directional valve, recording the opening and closing process of the tested electromagnetic directional valve by using a pressure sensor 12, and measuring the opening time, the closing time, the opening lag time and the closing lag time of the tested electromagnetic directional valve;
s4, performing internal leakage test; starting a gear pump driving motor 3 in a crude oil supply main pipe, opening a two-position four-way electromagnetic valve 10, closing an experimental electromagnetic reversing valve, adjusting an overflow valve 9 to enable the pressure of an experimental branch unit pressure sensor 12 to change from zero to a nominal pressure range, opening a high-pressure needle valve 17, and measuring the leakage amount at the outlet of the experimental electromagnetic reversing valve by using a flowmeter (20);
s5, positive pressure loss; starting a gear pump driving motor 3 in a crude oil supply main pipe, opening a two-position four-way electromagnetic valve 10, adjusting an overflow valve 9 to enable the pressure of an experimental branch unit pressure sensor 12 to be a certain value, enabling an experimental electromagnetic directional valve to be completely opened, and enabling the flow to change from zero to the experimental flow range; measuring the pressure loss of the tested electromagnetic directional valve by using the pressure sensors 12 and 16 of the test branch unit, drawing a qv-delta p characteristic curve, and judging whether the pressure loss is in a designed allowable range or not according to the curve;
s6, reverse pressure loss; starting a gear pump driving motor 3 in a crude oil supply main pipe, opening a two-position four-way electromagnetic valve 10, adjusting an overflow valve 9 to enable the pressure of an experimental branch unit pressure sensor 12 to be a certain value, enabling an experimental electromagnetic directional valve to be completely opened, and enabling the flow to change from zero to the experimental flow range; measuring the reverse pressure loss of the tested electromagnetic directional valve by using the pressure sensors 12 and 16 of the test branch unit, drawing a qv-delta p characteristic curve, and judging whether the pressure loss is in a designed allowable range or not according to the curve;
s7, back pressure test; starting a gear pump driving motor 3 in a crude oil supply main pipe, opening a two-position four-way electromagnetic valve 10, closing an experimental electromagnetic directional valve, adjusting an overflow valve 9 to enable the pressure of an experimental branch unit pressure sensor 12 to gradually increase from zero to nominal pressure, closing a high-pressure needle valve 13 on an experimental branch unit, opening a backpressure branch high-pressure needle valve 13, enabling pressure oil to flow to a reverse cavity R port through an oil return collecting pipe 15, observing the state of the experimental electromagnetic directional valve in the test process, and checking whether all parts deform after the test is finished. If the deformation is within the allowable range, the tested valve is qualified; if the deformation is out of the allowable range, the tested valve is unqualified;
s8, durability life test; starting a gear pump driving motor 3 in a crude oil supply main pipe, opening a two-position four-way electromagnetic valve 10, adjusting an overflow valve 9 to enable the pressure of an experiment branch unit pressure sensor 12 to be the nominal pressure of an experiment electromagnetic directional valve, enabling the passing flow to be the experiment flow, repeatedly reversing the experiment electromagnetic directional valve, recording the action times of the experiment electromagnetic directional valve, wherein the action times are not less than 2 ten thousand, and checking whether main parts and main performance meet the design requirements.
In embodiment 2, please refer to fig. 2, two or more experimental branches are connected in parallel for multi-station simultaneous experiment of the experimental electromagnetic directional valve. A method for testing an electromagnetic directional valve in an ultrahigh pressure environment comprises the following steps: installing the tested electromagnetic directional valve on an experimental station of ultrahigh pressure electromagnetic directional valve test equipment, and then performing a compression strength test, a high pressure sealing test, a response characteristic test, an internal leakage test, a forward pressure loss test, a reverse pressure loss test, a back pressure test and a durability service life test on the tested electromagnetic directional valve; the ultrahigh pressure electromagnetic directional valve test equipment comprises: the hydraulic oil tank 30 and a crude oil supply main pipe connected with the hydraulic oil tank, wherein the crude oil supply main pipe is connected with a low-pressure oil supply port P1 of the supercharger; a high-pressure output port Ph of the supercharger is connected with the experimental branch unit, and an oil return port T of the supercharger is connected with the hydraulic oil tank through a safe oil return pipe; the oil return main pipe is connected with the experiment branch unit and is connected with a hydraulic oil tank;
wherein: the crude oil supply main pipe is sequentially provided with an oil absorption filter 2, a gear pump 4, a one-way valve 5, a pipeline filter 7 and a pressure gauge 8, wherein the gear pump is connected with a gear pump driving motor 3, and a throttle valve 6 communicated with a safe oil return pipe is arranged between the pipeline filter and the one-way valve; a low-pressure overflow valve 9 and a two-position four-way electromagnetic valve 10 are also arranged between the crude oil supply main pipe and the safe oil return pipe;
the experiment branch unit is connected with two or more experiment branches and a backpressure branch in parallel; the method comprises the following steps that a high-pressure needle valve 13 is respectively arranged on two or more experiment branches and a backpressure branch, and the outlet of the high-pressure needle valve is connected with the inlet of an experimental electromagnetic directional valve; the outlet of the tested electromagnetic directional valve is connected with a return oil collecting pipe 15, and the return oil collecting pipe is provided with a loading pressure regulating valve 18, a loading throttle valve 19 and a flowmeter 20.
Above-mentioned technical scheme is preferred, still be equipped with the heater that is used for heating fluid on the hydraulic tank for detect the temperature sensor of the interior fluid temperature of hydraulic tank. In the normal experiment process, the heater does not work, when the temperature sensor detects that the temperature of the oil is lower than the temperature required by the experiment, the heater automatically starts to heat until the temperature meets the experiment temperature requirement, and stops working;
according to the preferable technical scheme, the oil leakage collecting box is arranged below the crude oil supply main pipe and the experiment branch unit and used for collecting oil leakage in the experiment process of the crude oil supply main pipe and oil leakage in the disassembly and assembly process of the experiment branch unit by the experiment electromagnetic directional valve and automatically recycling the oil leakage to the hydraulic oil tank 24.
Preferably, the oil return main pipe is provided with an air-cooled radiator; in the normal experiment process, the radiator does not work, when the temperature sensor detects that the oil temperature exceeds the temperature required by the experiment, the air-cooled radiator automatically starts cooling, and stops working until the temperature meets the experiment temperature requirement.
Above-mentioned technical scheme is preferred, be equipped with empty filter on the hydraulic tank for maintain oil tank internal pressure and atmosphere balance, avoid the pump cavitation phenomenon probably to appear, can be arranged in the filth in the filtration fluid when refueling again, communicate with the atmosphere all the time in the experimentation, do benefit to the hydraulic pump oil absorption.
Preferably, the hydraulic oil tank is provided with a liquid level thermometer; the hydraulic oil tank can display the liquid level and the temperature of oil in the hydraulic oil tank in real time.
The experimental method based on the ultrahigh pressure electromagnetic directional valve test equipment comprises the following steps: the method comprises the following specific steps:
s1, carrying out compressive strength test; starting a gear pump driving motor 3 in a crude oil supply main pipe, opening a two-position four-way electromagnetic valve 10, closing an experimental electromagnetic directional valve, adjusting an overflow valve 9 to enable the pressure of an experimental branch unit pressure sensor 12 to gradually increase from zero to nominal pressure, observing the state of the experimental electromagnetic directional valve in an adjusting process, and checking whether all parts deform after the adjustment. If the deformation is within the allowable range, the tested valve is qualified; if the deformation is out of the allowable range, the tested valve is unqualified;
s2, high-pressure sealing test; firstly, carrying out a P port high-pressure sealing test of a positive cavity of an experimental electromagnetic directional valve, starting a gear pump driving motor 3 in a crude oil supply main pipe, opening a two-position four-way electromagnetic valve 10, closing the experimental electromagnetic directional valve, adjusting an overflow valve 9 to enable the pressure of an experimental branch unit pressure sensor 12 to be gradually increased from zero to nominal pressure, and observing the state of the experimental electromagnetic directional valve in the test process; and secondly, performing a high-pressure sealing test on the R port of the reverse cavity of the tested electromagnetic directional valve, closing the high-pressure needle valve 13 on the test branch and the high-pressure needle valve 17 on the return oil collecting pipe 15, opening the high-pressure needle valve 13 on the back pressure branch, enabling pressure oil to flow to the R port of the reverse cavity of the tested electromagnetic directional valve through the return oil collecting pipe 15, observing the state of the tested electromagnetic directional valve in the test process, and checking whether all parts are deformed or not after the test is completed. If the deformation is within the allowable range, the tested valve is qualified; if the deformation is out of the allowable range, the tested valve is unqualified;
s3, response characteristic test; starting a gear pump driving motor 3 in a crude oil supply main pipe, opening a two-position four-way electromagnetic valve 10, adjusting an overflow valve 9 to enable the pressure of an experiment branch unit pressure sensor 12 to be the nominal pressure of the electromagnetic directional valve to be tested, enabling the passing flow to be the test flow, opening a high-pressure needle valve 17, and adjusting a loading overflow valve 18 to enable the back pressure of the electromagnetic directional valve to be tested to be zero. Opening and closing the tested electromagnetic directional valve, recording the opening and closing process of the tested electromagnetic directional valve by using a pressure sensor 12, and measuring the opening time, the closing time, the opening lag time and the closing lag time of the tested electromagnetic directional valve;
s4, performing internal leakage test; starting a gear pump driving motor 3 in a crude oil supply main pipe, opening a two-position four-way electromagnetic valve 10, closing an experimental electromagnetic reversing valve, adjusting an overflow valve 9 to enable the pressure of an experimental branch unit pressure sensor 12 to change from zero to a nominal pressure range, opening a high-pressure needle valve 17, and measuring the leakage amount at the outlet of the experimental electromagnetic reversing valve by using a flowmeter (20);
s5, positive pressure loss; starting a gear pump driving motor 3 in a crude oil supply main pipe, opening a two-position four-way electromagnetic valve 10, adjusting an overflow valve 9 to enable the pressure of an experimental branch unit pressure sensor 12 to be a certain value, enabling an experimental electromagnetic directional valve to be completely opened, and enabling the flow to change from zero to the experimental flow range; measuring the pressure loss of the tested electromagnetic directional valve by using the pressure sensors 12 and 16 of the test branch unit, drawing a qv-delta p characteristic curve, and judging whether the pressure loss is in a designed allowable range or not according to the curve;
s6, reverse pressure loss; starting a gear pump driving motor 3 in a crude oil supply main pipe, opening a two-position four-way electromagnetic valve 10, adjusting an overflow valve 9 to enable the pressure of an experimental branch unit pressure sensor 12 to be a certain value, enabling an experimental electromagnetic directional valve to be completely opened, and enabling the flow to change from zero to the experimental flow range; measuring the reverse pressure loss of the tested electromagnetic directional valve by using the pressure sensors 12 and 16 of the test branch unit, drawing a qv-delta p characteristic curve, and judging whether the pressure loss is in a designed allowable range or not according to the curve;
s7, back pressure test; starting a gear pump driving motor 3 in a crude oil supply main pipe, opening a two-position four-way electromagnetic valve 10, closing an experimental electromagnetic directional valve, adjusting an overflow valve 9 to enable the pressure of an experimental branch unit pressure sensor 12 to gradually increase from zero to nominal pressure, closing a high-pressure needle valve 13 on an experimental branch unit, opening a backpressure branch high-pressure needle valve 13, enabling pressure oil to flow to a reverse cavity R port through an oil return collecting pipe 15, observing the state of the experimental electromagnetic directional valve in the test process, and checking whether all parts deform after the test is finished. If the deformation is within the allowable range, the tested valve is qualified; if the deformation is out of the allowable range, the tested valve is unqualified;
s8, durability life test; starting a gear pump driving motor 3 in a crude oil supply main pipe, opening a two-position four-way electromagnetic valve 10, adjusting an overflow valve 9 to enable the pressure of an experiment branch unit pressure sensor 12 to be the nominal pressure of an experiment electromagnetic directional valve, enabling the passing flow to be the experiment flow, repeatedly reversing the experiment electromagnetic directional valve, recording the action times of the experiment electromagnetic directional valve, wherein the action times are not less than 2 ten thousand, and checking whether main parts and main performance meet the design requirements.
5.4 device principle
When the performance test is carried out, the tested electromagnetic directional valve is arranged on the oil path block of the test station, and the test equipment is started.
As shown in figure 1, in a normal state, the electromagnetic valve 10 and the test station 14 are not electrified, and the low-pressure overflow valve 9 is adjusted to zero pressure. When carrying out the performance experiment, motor 3 drives 4 fuel feeding of low noise gear pump and gives crude oil supply house steward, and solenoid valve 10 circular telegram is opened, and the booster is given in the fuel feeding, slowly adjusts low pressure overflow valve 9, makes experiment branch road unit pressure reach experimental pressure through the continuous pressure boost of booster 11. During testing, any one experiment branch unit can be selected for performance testing, two or more experiment branch units can be selected for simultaneous testing, and oil circuit switching is completed through the high-pressure needle valve 13. The back pressure branch is used for communicating the inlet and the outlet of the tested electromagnetic directional valve, and the branch can be used for a pressure test or a sealing test of the positive cavity and the negative cavity of the tested electromagnetic directional valve. A high-pressure needle valve 17 on the return oil collecting pipe 15 controls the outlet of the tested electromagnetic directional valve, and a loading pressure regulating valve 18, a loading throttle valve 19 and a flowmeter 20 are arranged on the return oil collecting pipe 15. The pressure sensors 12 and 16 are used for measuring the inlet and outlet pressures of the tested electromagnetic directional valve. During testing, one or two or more experimental units of the testing station 14 are electrified, and the voltage of the electromagnetic valve is controlled to perform performance testing. The pipeline filter 7 is used for filtering oil in the crude oil supply main pipe, and the cleanliness of the oil is guaranteed. The pressure gauge 8 is used for measuring the pressure of the crude oil supply main pipe. After the test is finished, the pressure of the crude oil supply main pipe is reduced to zero by adjusting the low-pressure overflow valve 9, the crude oil supply main pipe is electrified by the experimental electromagnetic directional valve, the loading pressure regulating valve 18 or the loading throttle valve 19 is completely loosened, the oil of the return oil collection pipe is unloaded back to the hydraulic oil tank 24, the experimental electromagnetic directional valve is detached, and the next experiment is continued. The hydraulic oil tank 24 is respectively provided with a heater 25, an air-cooled radiator 21 and a temperature sensor 27 for controlling the temperature of the system oil. If the temperature is too low and is lower than the preset value and is initially set to be 15 ℃ during the test of the equipment, the heater 25 automatically starts heating to reach the test temperature; if the temperature of the oil liquid is higher than the preset value and is initially set to be 50 ℃ in the equipment test process, the air-cooled radiator 21 automatically starts cooling, and the temperature of the oil liquid is reduced to the test temperature.
The test device also has other expanded functions:
1) an upgrading interface is reserved in the equipment, and the highest test pressure can reach 250MPa only by replacing a supercharger with a larger supercharging ratio;
2) according to the requirement of test beat, the number of test stations can be increased, and the test flow is increased;
the oil path block at the test station is replaced, and other pressure valves, flow valves and the like with the same specification can be tested. It should be noted that, when other hydraulic valve products are carried out, the maximum pressure, the maximum flow, the plug form and the voltage value of the tested electromagnetic directional valve need to be confirmed, and the function test cannot be carried out when any condition is not met.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present invention, such as increasing the number of crude oil supply main pipes and pressure boosters, increasing the number of experimental branch units, increasing the number of flow meters, etc., should be included in the scope of the present invention.
Claims (6)
1. A method for testing an electromagnetic directional valve in an ultrahigh pressure environment comprises the following steps: installing the tested electromagnetic directional valve on an experimental station of ultrahigh pressure electromagnetic directional valve test equipment, and then performing a compression strength test, a high pressure sealing test, a response characteristic test, an internal leakage test, a forward pressure loss test, a reverse pressure loss test, a back pressure test and a durability service life test on the tested electromagnetic directional valve; the ultrahigh pressure electromagnetic directional valve test equipment comprises: the system comprises a hydraulic oil tank and a crude oil supply main pipe connected with the hydraulic oil tank, wherein the crude oil supply main pipe is connected with a low-pressure oil supply port P1 of a supercharger; a high-pressure output port Ph of the supercharger is connected with the experimental branch unit, and an oil return port T of the supercharger is connected with the hydraulic oil tank through a safe oil return pipe; the oil return main pipe is connected with the experiment branch unit and is connected with a hydraulic oil tank; wherein: the crude oil supply main pipe is sequentially provided with an oil absorption filter, a gear pump, a one-way valve, a pipeline filter and a pressure gauge, wherein the gear pump is connected with a gear pump driving motor, and a throttle valve communicated with a safe oil return pipe is arranged between the pipeline filter and the one-way valve; a low-pressure overflow valve and a two-position four-way electromagnetic valve are also arranged between the crude oil supply main pipe and the safe oil return pipe; the experiment branch unit is at least connected with an experiment branch and a backpressure branch in parallel; respectively installing a high-pressure needle valve on each experiment branch and one backpressure branch, wherein the outlet of the high-pressure needle valve is connected with the inlet of the electromagnetic directional valve to be tested; an outlet of the tested electromagnetic directional valve is connected with an oil return collecting pipe, and a loading pressure regulating valve, a loading throttle valve and a flowmeter are arranged on the oil return collecting pipe;
the specific test method is as follows:
s1, carrying out compressive strength test; starting a gear pump driving motor (3) in a crude oil supply main pipe, opening a two-position four-way electromagnetic valve (10), closing an experimental electromagnetic directional valve, adjusting an overflow valve (9) to enable the pressure of an experimental branch unit pressure sensor (12) to be gradually increased from zero to nominal pressure, observing the state of the experimental electromagnetic directional valve in the adjusting process, and checking whether all parts are deformed or not after the adjustment is finished;
s2, high-pressure sealing test; firstly, carrying out a P port high-pressure sealing test of a positive cavity of an experimental electromagnetic directional valve, starting a gear pump driving motor (3) in a crude oil supply main pipe, opening a two-position four-way electromagnetic valve (10), closing the experimental electromagnetic directional valve, adjusting an overflow valve (9) to gradually increase the pressure of an experimental branch unit pressure sensor (12) from zero to nominal pressure, and observing the state of the experimental electromagnetic directional valve in the test process; secondly, performing a high-pressure sealing test on the R port of the reverse cavity of the tested electromagnetic directional valve, closing a high-pressure needle valve (13) on the test branch and a high-pressure needle valve (17) on the return oil collecting pipe (15), opening the high-pressure needle valve (13) of the back pressure branch, enabling pressure oil to flow to the R port of the reverse cavity of the tested electromagnetic directional valve through the return oil collecting pipe (15), observing the state of the tested electromagnetic directional valve in the test process, and checking whether all parts deform or not after the test is finished;
s3, response characteristic test; starting a gear pump driving motor (3) in a crude oil supply main pipe, opening a two-position four-way electromagnetic valve (10), adjusting an overflow valve (9) to enable the pressure of an experiment branch unit pressure sensor (12) to be the nominal pressure of an experiment electromagnetic directional valve, enabling the passing flow to be the experiment flow, opening a high-pressure needle valve (17), and adjusting a loading overflow valve (18) to enable the back pressure of the experiment electromagnetic directional valve to be zero. Opening and closing the tested electromagnetic directional valve, recording the opening and closing process of the tested electromagnetic directional valve by using a pressure sensor (12), and measuring the opening time and the closing time, the opening lag time and the closing lag time of the tested electromagnetic directional valve;
s4, performing internal leakage test; starting a gear pump driving motor (3) in a crude oil supply main pipe, opening a two-position four-way electromagnetic valve (10), closing an electromagnetic directional valve to be tested, adjusting an overflow valve (9) to enable the pressure of a pressure sensor (12) of an experimental branch unit to change from zero to a nominal pressure range, opening a high-pressure needle valve (17), and measuring the leakage amount at the outlet of the electromagnetic directional valve to be tested by using a flowmeter (20);
s5, positive pressure loss; starting a gear pump driving motor (3) in a crude oil supply main pipe, opening a two-position four-way electromagnetic valve (10), adjusting an overflow valve (9) to enable the pressure of an experimental branch unit pressure sensor (12) to be a certain value, enabling an experimental electromagnetic directional valve to be completely opened, and enabling the flow to change from zero to the experimental flow range; measuring the pressure loss of the tested electromagnetic directional valve by using the pressure sensors (12) and (16) of the test branch unit, and drawing a qv-delta p characteristic curve;
s6, reverse pressure loss; starting a gear pump driving motor (3) in a crude oil supply main pipe, opening a two-position four-way electromagnetic valve (10), adjusting an overflow valve (9) to enable the pressure of an experimental branch unit pressure sensor (12) to be a certain value, enabling an experimental electromagnetic directional valve to be completely opened, and enabling the flow to change from zero to the experimental flow range; measuring the reverse pressure loss of the tested electromagnetic directional valve by using the pressure sensors (12) and (16) of the test branch unit, and drawing a qv-delta p characteristic curve;
s7, back pressure test; starting a gear pump driving motor (3) in a crude oil supply main pipe, opening a two-position four-way electromagnetic valve (10), closing an experimental electromagnetic directional valve, adjusting an overflow valve (9) to gradually increase the pressure of an experimental branch unit pressure sensor (12) from zero to nominal pressure, closing a high-pressure needle valve (13) on the experimental branch unit, opening a backpressure branch high-pressure needle valve (13), enabling pressure oil to flow to a reverse cavity R port through an oil return header pipe (15), observing the state of the experimental electromagnetic directional valve, and checking whether all parts deform after completion.
S8, durability life test; starting a gear pump driving motor (3) in a crude oil supply main pipe, opening a two-position four-way electromagnetic valve (10), adjusting an overflow valve (9) to enable the pressure of an experiment branch unit pressure sensor (12) to be the nominal pressure of an experiment electromagnetic directional valve, enabling the passing flow to be the experiment flow, repeatedly reversing the experiment electromagnetic directional valve, recording the action times of the experiment electromagnetic directional valve, and checking main parts and main performance; the action times are not less than 2 ten thousand.
2. The method for testing the electromagnetic directional valve in the ultrahigh-pressure environment according to claim 1, characterized in that: the hydraulic oil tank is also provided with a heater for heating oil; and the temperature sensor is used for detecting the temperature of the oil liquid in the hydraulic oil tank.
3. The method for testing the electromagnetic directional valve in the ultrahigh-pressure environment according to claim 1, characterized in that: and an oil leakage collecting box is arranged below the crude oil supply main pipe and the experiment branch unit. The device is used for collecting the dripping and leaking oil in the experiment process of the crude oil supply main pipe and the dripping and leaking oil in the experiment branch unit assembling and disassembling process of the experiment electromagnetic directional valve, and automatically recovering the oil to the hydraulic oil tank (24).
4. The method for testing the electromagnetic directional valve in the ultrahigh-pressure environment according to claim 1, characterized in that: and an air-cooled radiator is arranged on the oil return main pipe.
5. The method for testing the electromagnetic directional valve in the ultrahigh-pressure environment according to claim 1, characterized in that: and an air filter is arranged on the hydraulic oil tank. Used for maintaining the pressure in the oil tank to be balanced with the atmosphere.
6. The method for testing the electromagnetic directional valve in the ultrahigh-pressure environment according to claim 1, characterized in that: and a liquid level thermometer is arranged on the hydraulic oil tank.
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